Playing RTSP audio/video stream

I am developing an application in which I want to play the RTSP audio/video stream. How to achieve this? I know that iPhone does not support RTSP protocol, but can this be achieved by any mean (may be by using third party library)?

After lot search, I came to know about an application "Tuner2 radio" (URL: http://www.indexcom.com/iphone/features.html). So it is possible. Can anybody give me any hint to make it possible i.e. a way to play RTSP audio/video stream?

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